Afib Newbie

Hello,  I am a 57 year old male.  6’4”, 250 lbs. my first afib episode was 3 years ago.  Went on Eliquis before a cardioversion. 2 years to my next episode. Recognized it and was cardioverted right away.  Same 4 months later and again 4 months later(last week). My afib doesn’t raise my heart rate, just goes wonky and as soon as I go up the stairs I know it’s back.  I have had a strange sensation in my chest for several years.  Sometimes more than others , but didn’t know what it was.  I was taking my pulse when one of the sensations hit and my heart skipped, do now I finally know.  Anyway, I feel a little (a lot) anxious about perhaps having an early demise.  My echo is normal according to my EP, but I see a few things that worry me. My E/A is 0.72.  EF is 57%.  Was 67% in Afib three years ago.   Should it drop that much? I fear my heart will stop and I fear my heart is aging faster than the rest of me.  Anyone have similar histories or any words of wisdom. Thanks!